Dental vulcanizer.



UNITED STATES Patented May 19, 1903.

PATENT OFFICE.

DENTAL vuLcANIzEn'.

l SPECIFICATION forming part of ',Iletters I atentNo. 728,375, dated May19, 1903. Application led September 19,1962'. Serial No. 124,095. Nomodel.) l

To a/ZZ whom it may concern.-

Beit known thatI I, CHARLES A.' DAVIS, a citizen of the United States,residing at Pasadena, in the countyy of Los Angeles and State ofCalifornia, have invented certain new and useful Improvements in DentalVulcanizers; and I de declare the following to be Va full, clear, andexact description of the invention, such as will enable others skilledinf the art to which it appertains to make and usethe same, referencebeing had to theaccompanying drawings, and to the letters ofreferencemarked thereon, which form a part of this specification.

This invention relates to new and useful*v improvements in dental orother vulcanizers; and it consists in the provision of means whereby thepressure of the cover bearing against the vuicanizing-boiler will beequalized upon all parts of its open edge, it being the purpose of thisinvention to improve upon and simplify this class of inventions byhinging the cover directto the receptacle inwhich the boiler is placedand securely clamping` Iwith-Va-Jlange E atits upperend, said ilangebeing adaptedto rest upon the raised pivotal the cover tothe boiler. l

More particularly the inventionwconsistsin the provision of a dentalvulcanizer in which the boiler is supported in such al manneras to tiltslightly, if necessary, when the cover is swung against thetop of thesame, whereby the pressure brought to bear upon the cover is equallydistributed over the upperv edge of the boiler, causing a steam-tightljoint as the parts are clamped together.

The invention consists, further, in` various details of construction andin combinations and arrangements offparts, as will behereinzv to betterillustrate theinvention and to show the slight tilting movement of theboiler in order to secure an equalization of pressure between the coverand the upper end of the Y l boiler. Fig. 2 is a perspective View of theupper end of the collar of the casing, showing the shape of the upperedge of said collar, whereby the collar of the boiler is supported attwo locations substantially diametrically opposite to allow fora'pslight tilting movement of the boiler. Fig.- 3 isaperspective view ofthe upper end ofthe boiler, and Fig. 4 is a side elevation of the Iupperportion of the boiler-supporting casing, showing the shape of its upperedge. l i

Reference now being had to the details of Vthe drawings by letter, Adesignates the vcasing of the vulcanizer, in which heat isintroduced byany suitable means, and B desigpartof the casing, the upper en d ofwhich 'collar or casting has two raised pivotal portions B, which arediametrically opposite, and the portion of theupper edgeof said collarintermediate said raised portionsinclines downward, as at C C..

V Ddesignates a vulcanizing-boiler which is `preferably of cylindricalshape and provided portion B'.a t .pointsfdiametrically opposite leachother formed on the upper yedgeot' said Yfilange. When the boiler ismounted as de- ;scribed,it willbe observed by an examina tiou of Fig. l;oflthedrawings that said boiler Qwill be allowed tortiltuslightly inopposite di- ;'rections In order tov get this tilting effect, ifpreferred, the upper marginal edge of the ,jcollar of the casing'mayV beflat and the un- @formed with pivotal bearings, intermediate whichbearings the undersurface of the iflange may be iuclir.ied,ftheessential feature ofv the inven tion being to produce means whereby aboilerfisadaptedto,tilt when the cover is forced against the same toproduce asteam-tight joint.`V Immediately above the flange of thevulcanizing-boiler is a shoulder E', and F designates a cover vtotheiboiler, which has an annularrecess'll", (shown clearly in Fig. 2 ofthe'drawings) in whicha gasket is placed, which recess is'adapted toreceive the upper contracted annu-lar portion e of the boiler. On theupper surface of the cover is a ribbed extension H integral therewith,one end of which is mounted on a piv- 'ider ledge of the ilangaeftheboiler may be Inates a metallic collar or `@casting forming a IOO otalpin K', carried by an integral projection K, forming part of the casing.Said ribbed portion of the collar is recessed, as at L, Fig. 2 of thedrawings, and is provided with an integral handle M, whereby the covermay be easily raised and lowered. At a location diametrically oppositethe integral projection K, forming a part of the casing, is a recess N,through the walls of which the pin N' passes, forming a pivot on whichthe lower end of the threaded screw O is mounted. Said screw carries anadjusting-nut O on its threaded portion, whereby as the cover is closedover the top of the vulcanizing-boiler l said screw may be swung into avertical position into the recess L in the ribbed portion of the cover,and by screwing down the nut O by means of ahand-wheel Q said nut willbear against the upper ribbed portion of the cover, and it will beobserved that the pressure exerted upon the gasket interposed betweenthe boiler and cover will be equalized, thereby causing a steam-tightjoint. The cover of the vulcanizer is provided with the usualthermometer R and with the safetyvalve S and blow-off pipe T of theusual construction, and suitable apertures are formed in thecircumference of the collar of the casing, whereby exit means isprovided for the heat to escape from the interior thereof.

From the foregoing it will be observed that by the provision of a dentalvulcanizer embodying the principle of myinvention apparatus of this kindis greatly simplied, and the cover to the vulcaniZing-boiler is hingeddirect to the collar of the casing, thus dispensing with the usualseparate cross-bar connection above the cover of the vulcanizer.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is-

l. A dental vulcanizer in which the vulcanizing-boiler is adapted totilt slightly as pressure is applied to a coverbearing against theboiler, whereby the pressure of the cover against the boiler isequalized, thereby making a steam-tight joint, as set forth.

2. A dental vulcanizer comprising a casing, a boiler mounted therein, acover hinged to the casing and adapted to bear against said boiler, saidboiler being adapted to tilt slightly as the cover is forced against theboiler,whereby the pressure of the cover against the rim of the boileris equalized, as set forth.

3. A dental vulcanizer comprising a casing, a cover hinged thereto, aboiler contained within said casing and supported thereby, and means forapplying pressure to the cover at a point opposite its pivotal portion,whereby as the cover is forced against the boiler, the latter is adaptedto tilt slightly, thus causing an equalization of pressure upon theupper end of the boiler, as set forth.

4. A dental vulcanizer comprising a casing,

a cover hinged thereto, a locking-screw pivoted to the casing, atightening-nut mounted on said screw and adapted to bear against thecover, whereby the latter may be forced down against the top of theboiler, which is adapted to tilt slightly, thus enabling the pressure tobe equalized upon the upper end of the boiler, and thereby making asteam-tight joint, as set forth.

5. Adental vulcanizer comprising a casing, a boiler contained thereinand supported thereon, a cover pivotally connected to said casing, ascrew pivoted at a location diametrically opposite the pivotal part ofthe cover andadapted to swingintoarecessin the cover, and atightening-nut mounted on said screw and adapted to bear against thecover, the contact-surfaces between the casing and the boiler being soconstructed that the boiler is adapted to tilt slightly as the cover isforced against the boiler, thereby equalizing the pressure upon thesame, as set forth.

6. A dental vulcanizer comprising a casing, a boiler contained withinsaid casing and adapted to rest at two locations diametrically oppositeon the upper edge of said casing, a cover pivoted to the casing andmeans for forcing the cover against the boiler, which is so constructedas to tilt slightly, whereby the pressure upon the same is equalized soas to make a steam-tight joint, as set forth.

7. A dental vulcanizer comprising a casing, a boiler contained thereinand adapted to rest upon portions of the edge of the casing formingpivotal points at locations diametrically opposite, a cover hinged tothe casing, and a tightening-screw for forcing the cover against theboiler, whereby the boiler is allowed to tilt slightly to equalize thepressure of the cover against the end thereof, as set forth.

8. A dental vnlcanizer comprising a casing, the upper end of which isprovided with two pivotal points at locations diametrically opposite, aboiler contained within the casing and having a flange or collar adaptedto rest upon said pivotal points, a cover pivoted to the casing, a screwalso pivoted to the casing, and a tightening-11111: carried on saidscrew and adapted to bear against the cover to force the same againstthe boiler, whereby the pressure on the upper end of the latter isequalized, as set forth.

9. A dental vulcanizer having a casing, a boiler-supporting surface,upon the upper marginal edge of which are formed pivotal points atlocations diametrically opposite, as set forth.

In testimony whereof I aiiix my signature in presence of two witnesses.

CHARLES A. DAVIS.

I/Vitnesses:

A. L. HOUGH, N. A. MAYHEW.

ICC

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